CN111491311B - Method and device for measuring receiving power of reference signal of synchronous signal block - Google Patents
Method and device for measuring receiving power of reference signal of synchronous signal block Download PDFInfo
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- CN111491311B CN111491311B CN201910082009.4A CN201910082009A CN111491311B CN 111491311 B CN111491311 B CN 111491311B CN 201910082009 A CN201910082009 A CN 201910082009A CN 111491311 B CN111491311 B CN 111491311B
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- H04W24/02—Arrangements for optimising operational condition
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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Abstract
The application provides a method and a device for measuring the receiving power of a reference signal of a synchronous signal block, belonging to the technical field of wireless communication. The method for measuring the received power SSB RSRP of the reference signal of the synchronous signal block is applied to a terminal and comprises the following steps: acquiring interference power based on measurement results of synchronous signals of different symbols of the same time slot; and calculating SSB RSRP according to the interference power. By the technical scheme, RSRP measurement accuracy can be improved.
Description
Technical Field
The present application relates to the field of wireless communications technologies, and in particular, to a method and an apparatus for measuring a reference signal received power of a synchronization signal block.
Background
In a scenario where urban areas are dense and SSBs (Synchronization Signal Block, synchronization signal blocks) are configured with horizontal wide beams and time-frequency domain alignment, test results show that as a single station increases in distance, SSB RSRP (Reference Signal Receiving Power, reference signal received power) gradually decreases, but when the distance increases to 500 meters, the SSB RSRP fluctuation range is larger and can reach [ -80dB, -120dB ], specifically, the reason is related to the SSB implementation mechanism, which is as follows:
SSB RSRP is calculated by the difference between the received power and the noise/interference, and is defined in standard that the received power is measured using SSS (Secondary Synchronization Signal ) reference signals, but the reference signals for noise/interference measurement are not limited. The existing network adopts a PBCH (Physical Broadcast Channel ) DMRS (Demodulation Reference Signal, demodulation reference signal) to measure noise/interference, and the accuracy of the measurement is influenced by the neighbor SSB data field and the dmRS reference signal with the same mode, namely, the larger the neighbor SSB interference is, the worse the RSRP estimation accuracy is, so that the larger the RSRP fluctuation range is possibly caused.
Disclosure of Invention
The application aims to provide a method and a device for measuring the reference signal receiving power of a synchronous signal block, which can improve the RSRP measurement accuracy.
In order to solve the technical problems, the embodiment of the application provides the following technical scheme:
the embodiment of the application provides a method for measuring SSB RSRP of reference signal received power of a synchronous signal block, which is applied to a terminal and comprises the following steps:
acquiring interference power based on measurement results of synchronous signals of different symbols of the same time slot;
and calculating SSB RSRP according to the interference power.
Further, the obtaining the interference power based on the measurement result of the synchronization signal of the different symbols of the same time slot includes:
respectively measuring SSB RSRP by adopting a main synchronous signal and a secondary synchronous signal with different symbols in the same time slot;
and determining the interference power according to the relation between the primary synchronization signal and the secondary synchronization signal of different symbols in the same time slot.
Further, the acquiring the interference power based on the measurement result of the synchronization signal includes:
the interference power, RSRP, is calculated using the following formula:
wherein X1 and X2 respectively represent a primary synchronization signal and a secondary synchronization signal, a channel matrix h1 of the primary synchronization signal symbol=a channel matrix H2 of the secondary synchronization signal symbol, and Y1 and Y2 distribution represent the received signals of the terminal on the symbols of the primary synchronization signal and the secondary synchronization signal.
Further, the calculating SSB RSRP according to the interference power includes:
SSB RSRP is calculated using the following formula:
the embodiment of the application also provides a device for measuring the reference signal received power (SSB RSRP) of the synchronous signal block, which is applied to the terminal and comprises the following steps:
the interference power calculation module is used for obtaining interference power based on measurement results of synchronous signals of different symbols in the same time slot;
and the processing module is used for calculating SSB RSRP according to the interference power.
Further, the interference power calculation module is specifically configured to measure SSB RSRP by using a primary synchronization signal and a secondary synchronization signal of different symbols in the same time slot respectively; and determining the interference power according to the relation between the primary synchronization signal and the secondary synchronization signal of different symbols in the same time slot.
Further, the interference power calculation module is specifically configured to calculate and obtain an interference power interference RSRP according to the following formula:
wherein X1 and X2 respectively represent a primary synchronization signal and a secondary synchronization signal, a channel matrix h1 of the primary synchronization signal symbol=a channel matrix H2 of the secondary synchronization signal symbol, and Y1 and Y2 distribution represent the received signals of the terminal on the symbols of the primary synchronization signal and the secondary synchronization signal.
Further, the processing module is specifically configured to calculate SSB RSRP using the following formula:
the embodiment of the application also provides a synchronization signal block reference signal received power (SSB RSRP) measuring device, which comprises: a memory, a processor and a computer program stored on the memory and executable on the processor, which when executed by the processor implements the steps in the SSB RSRP measurement method as described above.
Embodiments of the present application also provide a computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps in the SSB RSRP measurement method as described above.
The embodiment of the application has the following beneficial effects:
in the scheme, the interference power is obtained based on the measurement results of the synchronous signals of different symbols in the same time slot, and the SSB RSRP is obtained by calculation according to the interference power, specifically, the RSRP can be measured according to the main and auxiliary synchronous signals with longer sequences of different symbols and better orthogonality in the same time slot, the RSRP measurement accuracy is improved, and more effective reference is provided for 5G coverage correlation analysis.
Drawings
FIG. 1 is a schematic diagram of RSRP versus distance;
fig. 2 is a flowchart of a method for measuring a reference signal received power of a synchronization signal block according to an embodiment of the present application;
fig. 3 is a block diagram of a synchronization signal block reference signal received power measurement apparatus according to an embodiment of the present application.
Detailed Description
In order to make the technical problems, technical solutions and advantages to be solved by the embodiments of the present application more apparent, the following detailed description will be given with reference to the accompanying drawings and the specific embodiments.
The names and abbreviations of the terms involved in the present application change correspondingly, and the technical scheme of the present application is still applicable when the abbreviations change.
In a scenario where urban areas are dense and SSB is configured with horizontal wide beams and time-frequency domain alignment, as shown in fig. 1, test results show that as the single station increases in distance, SSB RSRP gradually decreases, but when the single station increases to 500 meters, the SSB RSRP fluctuation range is larger, and can reach [ -80dB, -120dB ], specifically, the reason is related to the SSB implementation mechanism, which is specifically as follows:
the SSB RSRP is calculated by the difference between the received power and the noise/interference, and the received power is defined in standard and measured by using SSS reference signals, but the reference signals for noise/interference measurement are not limited. The existing network adopts PBCH DMRS to measure noise/interference, but the PBCH DMRS is used for measuring noise/interference, so that the accuracy of the method is influenced by the neighbor SSB data field and the same mode DMRS reference signal, namely, the larger the neighbor SSB interference is, the worse the RSRP estimation accuracy is, and the larger the RSRP fluctuation range is possibly caused. The DMRS is configured with a narrowband 20RB (resource block) and the frequency domain density is 3RE (resource element)/RB, and the PSS/SSS is configured with a narrowband 12RB and the frequency domain density is 12RE/RB. Compared with the DMRS, the primary and secondary synchronization signal PSS/SSS sequences are longer and the orthogonality between cells is better, so that the RSRP measurement accuracy based on the PSS/SSS is higher.
The embodiment of the application provides a method for measuring the reference signal received power (SSB RSRP) of a synchronous signal block, which is applied to a terminal, as shown in fig. 2, and comprises the following steps:
step 101: acquiring interference power based on measurement results of synchronous signals of different symbols of the same time slot;
step 102: and calculating SSB RSRP according to the interference power.
In this embodiment, interference power is obtained based on measurement results of synchronization signals of different symbols in the same time slot, and SSB RSRP is obtained by calculation according to the interference power, specifically, RSRP can be measured according to primary and secondary synchronization signals with longer sequences of different symbols and better orthogonality in the same time slot, so as to improve RSRP measurement accuracy, and provide more effective reference for 5G coverage correlation analysis.
Further, the obtaining the interference power based on the measurement result of the synchronization signal of the different symbols of the same time slot includes:
respectively measuring SSB RSRP by adopting a main synchronous signal and a secondary synchronous signal with different symbols in the same time slot;
and determining the interference power according to the relation between the primary synchronization signal and the secondary synchronization signal of different symbols in the same time slot.
Further, the acquiring the interference power based on the measurement result of the synchronization signal includes:
the interference power, RSRP, is calculated using the following formula:
wherein X1 and X2 respectively represent a primary synchronization signal and a secondary synchronization signal, a channel matrix h1 of the primary synchronization signal symbol=a channel matrix H2 of the secondary synchronization signal symbol, and Y1 and Y2 distribution represent the received signals of the terminal on the symbols of the primary synchronization signal and the secondary synchronization signal.
Further, the calculating SSB RSRP according to the interference power includes:
SSB RSRP is calculated using the following formula:
the technical scheme of the application is further described below with reference to specific embodiments, and the SSB RSRP measurement method of the embodiment includes the following steps:
first, SSB RSRP is measured using PSS and SSS in the same slot, and the downlink primary synchronization signal and secondary synchronization signal transmission procedure can be expressed as
Y1＝H1X1+N1
Y2＝H2X2+N2
Wherein X1 and X2 respectively represent PSS and SSS, H1 and H2 respectively represent channel matrices of PSS and SSS symbols, and Y1 and Y2 distribution represents reception signals of the terminal on the PSS and SSS symbols.
Then, the power calculation mode of SSB noise/interference is deduced according to the relation between PSS and SSS of different symbols in the same time slot,
Y1X1 H ＝H1X1X1 H +N1X1 H
Y2X2 H ＝H2X2X2 H +N2X2 H
the difference value can be obtained by taking the equations left and right,
(Y1X1 H -Y2X2 H )＝N1X1 H -N2X2 H
it is assumed therein that the channel state variation between the co-slotted PSS and SSS symbols is negligible, i.e. h1=h2.
The power of the noise/interference can thus be expressed as,
finally, subtracting the PSS-based noise/interference power from the SSS measurement-based total received power yields an SSB RSRP estimate:
in this embodiment, the accuracy of 5G SSB RSRP measurement can be effectively improved by selecting the primary and secondary synchronization signals with longer sequences for noise/interference estimation.
The embodiment of the application also provides a device for measuring the reference signal received power (SSB RSRP) of the synchronous signal block, which is applied to a terminal, as shown in fig. 3, and comprises the following steps:
an interference power calculation module 21, configured to obtain interference power based on measurement results of synchronization signals of different symbols in the same slot;
and the processing module 22 is used for calculating SSB RSRP according to the interference power.
In this embodiment, interference power is obtained based on measurement results of synchronization signals of different symbols in the same time slot, and SSB RSRP is obtained by calculation according to the interference power, specifically, RSRP can be measured according to primary and secondary synchronization signals with longer sequences of different symbols and better orthogonality in the same time slot, so as to improve RSRP measurement accuracy, and provide more effective reference for 5G coverage correlation analysis.
Further, the interference power calculation module 21 is specifically configured to measure SSB RSRP using a primary synchronization signal and a secondary synchronization signal of different symbols in the same time slot respectively; and determining the interference power according to the relation between the primary synchronization signal and the secondary synchronization signal of different symbols in the same time slot.
Further, the interference power calculation module 21 is specifically configured to calculate the interference power interference RSRP according to the following formula:
wherein X1 and X2 respectively represent a primary synchronization signal and a secondary synchronization signal, a channel matrix h1 of the primary synchronization signal symbol=a channel matrix H2 of the secondary synchronization signal symbol, and Y1 and Y2 distribution represent the received signals of the terminal on the symbols of the primary synchronization signal and the secondary synchronization signal.
Further, the processing module 22 is specifically configured to calculate the SSB RSRP according to the following formula:
the embodiment of the application also provides a synchronization signal block reference signal received power (SSB RSRP) measuring device, which comprises: a memory, a processor and a computer program stored on the memory and executable on the processor, which when executed by the processor implements the steps in the SSB RSRP measurement method as described above.
Embodiments of the present application also provide a computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps in the SSB RSRP measurement method as described above.
It is to be understood that the embodiments described herein may be implemented in hardware, software, firmware, middleware, microcode, or a combination thereof. For a hardware implementation, the processing units may be implemented within one or more application specific integrated circuits (Application Specific Integrated Circuits, ASIC), digital signal processors (Digital Signal Processing, DSP), digital signal processing devices (DSP devices, DSPD), programmable logic devices (Programmable Logic Device, PLD), field programmable gate arrays (Field-Programmable Gate Array, FPGA), general purpose processors, controllers, microcontrollers, microprocessors, other electronic units designed to perform the functions described herein, or a combination thereof.
For a software implementation, the techniques described herein may be implemented with modules (e.g., procedures, functions, and so on) that perform the functions described herein. The software codes may be stored in a memory and executed by a processor. The memory may be implemented within the processor or external to the processor.
In this specification, each embodiment is described in a progressive manner, and each embodiment is mainly described by differences from other embodiments, and identical and similar parts between the embodiments are all enough to be referred to each other.
It will be apparent to those skilled in the art that embodiments of the present application may be provided as a method, apparatus, or computer program product. Accordingly, embodiments of the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, embodiments of the application may take the form of a computer program product on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.
Embodiments of the present application are described with reference to flowchart illustrations and/or block diagrams of methods, user terminals (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing user terminal to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing user terminal, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing user terminal to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing user terminal to cause a series of operational steps to be performed on the computer or other programmable user terminal to produce a computer implemented process such that the instructions which execute on the computer or other programmable user terminal provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiment and all such alterations and modifications as fall within the scope of the embodiments of the application.
It is further noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or user terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or user terminal. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article or user terminal comprising the element.
While the foregoing is directed to the preferred embodiments of the present application, it will be appreciated by those skilled in the art that various modifications and changes can be made without departing from the principles of the present application, and such modifications and changes are intended to be within the scope of the present application.
Claims (4)
1. A method for measuring a synchronization signal block reference signal received power SSB RSRP, applied to a terminal, comprising:
acquiring interference power based on measurement results of synchronous signals of different symbols of the same time slot;
calculating SSB RSRP according to the interference power;
the obtaining the interference power based on the measurement result of the synchronous signals with different symbols in the same time slot comprises the following steps:
respectively measuring SSB RSRP by adopting a main synchronous signal and a secondary synchronous signal with different symbols in the same time slot;
determining the interference power according to the relation between the main synchronous signal and the auxiliary synchronous signal of different symbols of the same time slot;
the obtaining the interference power based on the measurement result of the synchronous signal comprises the following steps:
the interference power, RSRP, is calculated using the following formula:
wherein X1 and X2 respectively represent a primary synchronization signal and a secondary synchronization signal, a channel matrix h1 of a primary synchronization signal symbol=a channel matrix H2 of a secondary synchronization signal symbol, and Y1 and Y2 distribution represent receiving signals of a terminal on the symbols of the primary synchronization signal and the secondary synchronization signal;
the calculating the SSB RSRP according to the interference power includes:
SSB RSRP is calculated using the following formula:
SSB RSRP＝(Y2X2 H ) 2 -interfering RSRP.
2. A synchronization signal block reference signal received power SSB RSRP measurement apparatus, applied to a terminal, comprising:
the interference power calculation module is used for obtaining interference power based on measurement results of synchronous signals of different symbols in the same time slot;
the processing module is used for calculating SSB RSRP according to the interference power;
the interference power calculation module is specifically used for respectively measuring SSB RSRP by adopting a main synchronization signal and an auxiliary synchronization signal of different symbols in the same time slot; determining the interference power according to the relation between the main synchronous signal and the auxiliary synchronous signal of different symbols of the same time slot;
the interference power calculation module is specifically configured to calculate and obtain an interference power interference RSRP according to the following formula:
wherein X1 and X2 respectively represent a primary synchronization signal and a secondary synchronization signal, a channel matrix h1 of a primary synchronization signal symbol=a channel matrix H2 of a secondary synchronization signal symbol, and Y1 and Y2 distribution represent receiving signals of a terminal on the symbols of the primary synchronization signal and the secondary synchronization signal;
the processing module is specifically configured to calculate SSB RSRP according to the following formula:
SSB RSRP＝(Y2X2 H ) 2 -interfering RSRP.
3. A synchronization signal block reference signal received power SSB RSRP measurement apparatus, comprising: memory, a processor and a computer program stored on the memory and executable on the processor, which when executed by the processor realizes the steps in the SSB RSRP measurement method according to claim 1.
4. A computer readable storage medium, characterized in that it has stored thereon a computer program which, when executed by a processor, implements the steps of the SSB RSRP measurement method according to claim 1.
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| WO2018143697A1 (en) * | 2017-02-01 | 2018-08-09 | Samsung Electronics Co., Ltd. | Method and apparatus for channel state information report in wireless communication system |
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